Recently, the webzine A List Apart published an article by Chris Clark that demonstrated stylesheet switching using PHP.
The technique works all fine and dandy unless you’re using a more recent installation that (sensibly) doesn’t have register_globals set, whereupon nothing much happens at all.
Fortunately, a couple of easy modifications script using the predefined variables syntax now in use since PHP 4.1.0 will take care of this.
First up, the code in “STAGE ONE: Setting styles” for the switcher.php file should read:
<?php
setcookie("sitestyle", $_GET["set"], time() + 31536000, "/", "yourdomain.com", 0);
header("Location: $HTTP_REFERER");
?>
Secondly, the code in “STAGE TWO: Detecting styles” should be:
<link rel="stylesheet" type="text/css" media="screen" title="User
Defined Style" href="<?php echo isset($_COOKIE['sitestyle']) ? $_COOKIE['sitestyle'] : 'defaultstyle' ?>.css" />
And that should be just about it.